• On Orbitz, Mac Users Steered to Pricier Hotels – The Wall Street Journal, as part of a continuing series on how personal information is used to shape Web commerce, says Orbitz has been experimenting with show Mac user more expensive hotel deals than Windows users. Research shows Mac users tend to spend more on travel their their Windows counterparts.

• Microsoft buys Yammer for $1.2 billion – As had been expected, Microsoft announced it is buying Yammer, an enterprise social networking service. It will become a part of the Office division, but don’t expect to see it integrated into the 2013 version of Office.